共 20 条
[12]
NEDOKVOCHAYEN N, 1904, ANN I AGRON MOSCOU, V10, P257
[14]
PITZ W, 1916, J AGR RES, V5, P771
[15]
PRUCHA MJ, 1915, N Y AGR EXP STA MEM, V5
[16]
SCHULZE E, 1897, Z PHYSL CHEM, V22, P82
[17]
Stewart GR, 1918, J AGRIC RES, V12, P0311
[19]
WILSON JK, 1917, N Y AGR EXP STA B, V386